Nintendo doesn't need Steam. I thought maybe a collaboration with Valve would work, but honestly Nintendo just needs a chip from AMD which can run Wii U games but also modern PC games, and honestly I don't think AMD would have too much trouble with such a task in a couple of years. GPU tech is advancing rapidly every year, Nintendo could quite easily probably have a solution that runs Wii U games perfectly fine and also smokes the PS4/720 which can't cut the mustard for 1080P standard.
So I think there's an oppurtunity for Nintendo there to move in and get people who were expecting more from the XB1/PS4.
Valve really isn't needed. Nintendo has distribution, marketing, etc. that reaches far beyond what Valve brings to the table and an already established relationship with AMD.
